#eer-calculator-container {
    background-color: #f0f8ff;
    border: 2px solid #4b0082;
    border-radius: 10px;
    padding: 20px;
    max-width: 400px;
    margin: 20px auto;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

h2 {
    text-align: center;
    color: #4b0082;
}

.input-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #4b0082;
}

input {
    width: calc(100% - 20px);
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    background-color: #4b0082;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
}

button:hover {
    background-color: #6a5acd;
}

.result {
    margin-top: 20px;
    text-align: center;
    font-size: 18px;
    color: #2f4f4f;
}